Originally Posted by
TimothyH
A 6° 130mm stem will be 13.59 mm high and 129.29 mm long
A 17° 130mm stem will be 38.01 mm high and 124.32 mm long
Going from 6° to 17° will increase height ~25mm and decrease reach ~5mm
Someone can check the math...

Your math looka fine. . . except X is the horizontal and Y is the vertical, you seem to have them swapped.